White 1 J-'^^ [Dec. 17, 



Also notes by Prof. I. 0. White, Asst. Geologist and Pro- 

 fessor of Natural History in the University of West Vir- 

 ginia, stating his conclusions respecting the distribution of 

 the members of the Conglomerate in Western Pennsylvania. 



Mr. Lesley exhibited an index guage which he had had 

 constructed by Messrs. Young, of Philadelphia, for the use 

 of the Survey, and showed a small topographical model in 

 wax which had been made by meaiiS of it. 



The Treasurer read the report of the Committee on 

 Finance. 



On motion, the appropriations recommended by the Com- 

 mittee were passed. 



The report of the Trustees of the Building Fund was read 

 by the Treasurer. 



On motion of Mr. Lesley, the Committee on Publication 

 was authorized to issue the articles published in the Transac- 

 tions, separately, or together, at their discretion. 



And the meeting was adjourned. 



Notes on the Place of the Sharon Conglomerate in the Palceozok Series. By 

 Prof. I. C. White. 



{Read before the American Philosophical Society, Dec. 17, 1880.) 



With regard to the place of tliis rock in tlie series, about which there 

 has been much diversity of opinion among geologists, I have to say that 

 my study of it and its associated rocks during the past season in this dis- 

 trict,* as well as in Venango and Warren counties, to the east, and in the 

 State of Oliio to the west, has dispelled tlie idea that I at one time enter- 

 tained of the possibility of its being the Vespertine Conglomerate, or No. 

 X of Rogers, and has confirmed me in the position that I took in my 

 reports Q and QQ on Beaver and Lawrence counties, viz : that it is the true 

 base of No. XII. 



It may be of interest to state here tlie reasons which caused me to enter- 

 tain such a possibility. 



It happened that during my season's work in Mercer county in '78, I 

 discovered a new limestone in the Mahoming river, only about 50' above 

 the horizon of the Sharon Conglomerate, and nearly 100' below any lime- 

 stone hitherto known in Western Pennsylvania. It was filled with fossils 

 and some of them seemed to be related to Subcarboniferous types. 



* These notes were written for the Report of Progress of the Survey in Erie 

 and Crawford counties. J. P. L. 



